Fair Value Disclosures (Non-Pension Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010		Jun. 30, 2010	Dec. 31, 2009
Assets	$ 72.9		$ 78.1
Liabilities	3.0		2.0
Cash and cash equivalents	143.6		139.6		259.8	278.3
Other assets	346.9		346.2
Cash and Cash Equivalents [Member]
Investment Securities Balance Sheet Location	4.9		7.4
Other Assets [Member]
Investment Securities Balance Sheet Location	15.6		15.3
Money Market Fund Investments [Member]
Assets	10.4	[1]	10.5	[1]
Money Market Fund Investments [Member] | Quoted Prices in Active Markets for Identical Assets (Level1)
Assets	0	[1]	0	[1]
Money Market Fund Investments [Member] | Significant Other Observable Inputs (Level 2)
Assets	10.4	[1]	10.5	[1]
Money Market Fund Investments [Member] | Significant Unobservable Inputs (Level 3)
Assets	0	[1]	0	[1]
Investment Securities, Including Mutual Funds [Member]
Assets	20.5	[2]	22.7	[2]
Investment Securities, Including Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level1)
Assets	7.7	[2]	7.4	[2]
Investment Securities, Including Mutual Funds [Member] | Significant Other Observable Inputs (Level 2)
Assets	12.8	[2]	15.3	[2]
Investment Securities, Including Mutual Funds [Member] | Significant Unobservable Inputs (Level 3)
Assets	0	[2]	0	[2]
Interest Rate Swaps [Member]
Assets	41.5		42.3
Interest Rate Swaps [Member] | Quoted Prices in Active Markets for Identical Assets (Level1)
Assets	0		0
Interest Rate Swaps [Member] | Significant Other Observable Inputs (Level 2)
Assets	41.5		42.3
Interest Rate Swaps [Member] | Significant Unobservable Inputs (Level 3)
Assets	0		0
Foreign Currency Derivatives [Member]
Assets	0.5		2.6
Liabilities	3.0		2.0
Foreign Currency Derivatives [Member] | Quoted Prices in Active Markets for Identical Assets (Level1)
Assets	0		0
Liabilities	0		0
Foreign Currency Derivatives [Member] | Significant Other Observable Inputs (Level 2)
Assets	0.5		2.6
Liabilities	3.0		2.0
Foreign Currency Derivatives [Member] | Significant Unobservable Inputs (Level 3)
Assets	0		0
Liabilities	0		0
Quoted Prices in Active Markets for Identical Assets (Level1)
Assets	7.7		7.4
Liabilities	0		0
Significant Other Observable Inputs (Level 2)
Assets	65.2		70.7
Liabilities	3.0		2.0
Significant Unobservable Inputs (Level 3)
Assets	0		0
Liabilities	$ 0		$ 0

[1] Investments in money market funds are classified as cash equivalents due to their short-term nature and the ability for them to be readily converted into cash. Investments in money market funds are valued at the net asset value per share or unit multiplied by the number of shares or units held as of the measurement date and, accordingly, have been classified as Level 2 investments.

[2] The values of investment securities, including mutual funds, are classified as cash and cash equivalents ($4.9 million and $7.4 million as of June 30, 2011 and December 31, 2010, respectively) and other assets ($15.6 million and $15.3 million as of June 30, 2011 and December 31, 2010, respectively). For mutual funds that are publicly traded, fair value is determined on the basis of quoted market prices and, accordingly, these investments have been classified as Level 1. Other investment securities are valued at the net asset value per share or unit multiplied by the number of shares or units held as of the measurement date and have been classified as Level 2.